We were in Morrison Illinois watching the Morrison Mud Racers, when I looked up and saw a disk-shaped very white saucer in the sky. It seemed to appear out of nowhere....was moving slowly towards the right, then went down, then straight up. It took a second for me to try to figure out what it was.. well, it wasn't an airplane, or light...I could not believe what I was seeing.... I was telling everyone..LOOK - a UFO!!!! Right at that time, it jetted, and was gone.